Noninterest Income - Credit Card Fees (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Card interchange fees, net	$ 22,848	$ 21,775
Revenue from contracts with customers	328,139	222,440
Revenue not from contract with customer	416,041	79,494
Total credit card fees	27,567	28,304
Merchant service fees
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	3,772	5,027
Card service fees
Disaggregation of Revenue [Line Items]
Revenue not from contract with customer	$ 947	$ 1,502